Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1 | /* |
| 2 | * |
murgatroid99 | 4080921 | 2016-01-13 17:45:30 -0800 | [diff] [blame] | 3 | * Copyright 2015-2016, Google Inc. |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions are |
| 8 | * met: |
| 9 | * |
| 10 | * * Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * * Redistributions in binary form must reproduce the above |
| 13 | * copyright notice, this list of conditions and the following disclaimer |
| 14 | * in the documentation and/or other materials provided with the |
| 15 | * distribution. |
| 16 | * * Neither the name of Google Inc. nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 24 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 25 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 26 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 30 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | * |
| 32 | */ |
| 33 | |
Craig Tiller | 9533d04 | 2016-03-25 17:11:06 -0700 | [diff] [blame] | 34 | #include "src/core/lib/transport/metadata.h" |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 35 | |
Craig Tiller | 9fa41b9 | 2015-04-10 15:08:03 -0700 | [diff] [blame] | 36 | #include <assert.h> |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 37 | #include <stddef.h> |
| 38 | #include <string.h> |
| 39 | |
Craig Tiller | ebdef9d | 2015-11-19 17:09:49 -0800 | [diff] [blame] | 40 | #include <grpc/compression.h> |
yang-g | cb7a802 | 2016-03-30 14:58:53 -0700 | [diff] [blame] | 41 | #include <grpc/grpc.h> |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 42 | #include <grpc/support/alloc.h> |
Craig Tiller | 9fa41b9 | 2015-04-10 15:08:03 -0700 | [diff] [blame] | 43 | #include <grpc/support/atm.h> |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 44 | #include <grpc/support/log.h> |
Craig Tiller | ebdef9d | 2015-11-19 17:09:49 -0800 | [diff] [blame] | 45 | #include <grpc/support/string_util.h> |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 46 | #include <grpc/support/time.h> |
Craig Tiller | 0cb803d | 2016-03-02 22:17:24 -0800 | [diff] [blame] | 47 | |
Craig Tiller | adcb92d | 2016-03-28 10:14:05 -0700 | [diff] [blame] | 48 | #include "src/core/ext/transport/chttp2/transport/bin_encoder.h" |
Craig Tiller | 9533d04 | 2016-03-25 17:11:06 -0700 | [diff] [blame] | 49 | #include "src/core/lib/iomgr/iomgr_internal.h" |
| 50 | #include "src/core/lib/profiling/timers.h" |
| 51 | #include "src/core/lib/support/murmur_hash.h" |
| 52 | #include "src/core/lib/support/string.h" |
Craig Tiller | 9533d04 | 2016-03-25 17:11:06 -0700 | [diff] [blame] | 53 | #include "src/core/lib/transport/static_metadata.h" |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 54 | |
Craig Tiller | 70b080d | 2015-11-19 08:04:48 -0800 | [diff] [blame] | 55 | /* There are two kinds of mdelem and mdstr instances. |
| 56 | * Static instances are declared in static_metadata.{h,c} and |
| 57 | * are initialized by grpc_mdctx_global_init(). |
| 58 | * Dynamic instances are stored in hash tables on grpc_mdctx, and are backed |
| 59 | * by internal_string and internal_element structures. |
| 60 | * Internal helper functions here-in (is_mdstr_static, is_mdelem_static) are |
| 61 | * used to determine which kind of element a pointer refers to. |
| 62 | */ |
| 63 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 64 | #define INITIAL_STRTAB_CAPACITY 4 |
| 65 | #define INITIAL_MDTAB_CAPACITY 4 |
| 66 | |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 67 | #ifdef GRPC_METADATA_REFCOUNT_DEBUG |
| 68 | #define DEBUG_ARGS , const char *file, int line |
| 69 | #define FWD_DEBUG_ARGS , file, line |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 70 | #define REF_MD_LOCKED(shard, s) ref_md_locked((shard), (s), __FILE__, __LINE__) |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 71 | #else |
| 72 | #define DEBUG_ARGS |
| 73 | #define FWD_DEBUG_ARGS |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 74 | #define REF_MD_LOCKED(shard, s) ref_md_locked((shard), (s)) |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 75 | #endif |
| 76 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 77 | #define TABLE_IDX(hash, log2_shards, capacity) \ |
| 78 | (((hash) >> (log2_shards)) % (capacity)) |
| 79 | #define SHARD_IDX(hash, log2_shards) ((hash) & ((1 << (log2_shards)) - 1)) |
| 80 | |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 81 | typedef void (*destroy_user_data_func)(void *user_data); |
| 82 | |
Craig Tiller | 70b080d | 2015-11-19 08:04:48 -0800 | [diff] [blame] | 83 | /* Shadow structure for grpc_mdstr for non-static values */ |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 84 | typedef struct internal_string { |
| 85 | /* must be byte compatible with grpc_mdstr */ |
| 86 | gpr_slice slice; |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 87 | uint32_t hash; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 88 | |
| 89 | /* private only data */ |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 90 | gpr_atm refcnt; |
| 91 | |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 92 | uint8_t has_base64_and_huffman_encoded; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 93 | gpr_slice_refcount refcount; |
| 94 | |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 95 | gpr_slice base64_and_huffman; |
| 96 | |
yang-g | cb7a802 | 2016-03-30 14:58:53 -0700 | [diff] [blame] | 97 | uint8_t has_size_in_decoder_table; |
| 98 | size_t size_in_decoder_table; |
| 99 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 100 | struct internal_string *bucket_next; |
| 101 | } internal_string; |
| 102 | |
Craig Tiller | 70b080d | 2015-11-19 08:04:48 -0800 | [diff] [blame] | 103 | /* Shadow structure for grpc_mdelem for non-static elements */ |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 104 | typedef struct internal_metadata { |
| 105 | /* must be byte compatible with grpc_mdelem */ |
| 106 | internal_string *key; |
| 107 | internal_string *value; |
| 108 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 109 | /* private only data */ |
Craig Tiller | 9fa41b9 | 2015-04-10 15:08:03 -0700 | [diff] [blame] | 110 | gpr_atm refcnt; |
| 111 | |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 112 | gpr_mu mu_user_data; |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 113 | gpr_atm destroy_user_data; |
| 114 | gpr_atm user_data; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 115 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 116 | struct internal_metadata *bucket_next; |
| 117 | } internal_metadata; |
| 118 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 119 | typedef struct strtab_shard { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 120 | gpr_mu mu; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 121 | internal_string **strs; |
| 122 | size_t count; |
| 123 | size_t capacity; |
| 124 | } strtab_shard; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 125 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 126 | typedef struct mdtab_shard { |
| 127 | gpr_mu mu; |
| 128 | internal_metadata **elems; |
| 129 | size_t count; |
| 130 | size_t capacity; |
| 131 | size_t free; |
| 132 | } mdtab_shard; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 133 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 134 | #define LOG2_STRTAB_SHARD_COUNT 5 |
| 135 | #define LOG2_MDTAB_SHARD_COUNT 4 |
| 136 | #define STRTAB_SHARD_COUNT ((size_t)(1 << LOG2_STRTAB_SHARD_COUNT)) |
| 137 | #define MDTAB_SHARD_COUNT ((size_t)(1 << LOG2_MDTAB_SHARD_COUNT)) |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 138 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 139 | /* hash seed: decided at initialization time */ |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 140 | static uint32_t g_hash_seed; |
Craig Tiller | e62bf98 | 2015-12-02 17:11:49 -0800 | [diff] [blame] | 141 | static int g_forced_hash_seed = 0; |
Craig Tiller | ebdef9d | 2015-11-19 17:09:49 -0800 | [diff] [blame] | 142 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 143 | /* linearly probed hash tables for static element lookup */ |
| 144 | static grpc_mdstr *g_static_strtab[GRPC_STATIC_MDSTR_COUNT * 2]; |
| 145 | static grpc_mdelem *g_static_mdtab[GRPC_STATIC_MDELEM_COUNT * 2]; |
| 146 | static size_t g_static_strtab_maxprobe; |
| 147 | static size_t g_static_mdtab_maxprobe; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 148 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 149 | static strtab_shard g_strtab_shard[STRTAB_SHARD_COUNT]; |
| 150 | static mdtab_shard g_mdtab_shard[MDTAB_SHARD_COUNT]; |
| 151 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 152 | static void gc_mdtab(mdtab_shard *shard); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 153 | |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 154 | void grpc_test_only_set_metadata_hash_seed(uint32_t seed) { |
Craig Tiller | e62bf98 | 2015-12-02 17:11:49 -0800 | [diff] [blame] | 155 | g_hash_seed = seed; |
| 156 | g_forced_hash_seed = 1; |
| 157 | } |
| 158 | |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 159 | void grpc_mdctx_global_init(void) { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 160 | size_t i, j; |
Craig Tiller | e62bf98 | 2015-12-02 17:11:49 -0800 | [diff] [blame] | 161 | if (!g_forced_hash_seed) { |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 162 | g_hash_seed = (uint32_t)gpr_now(GPR_CLOCK_REALTIME).tv_nsec; |
Craig Tiller | e62bf98 | 2015-12-02 17:11:49 -0800 | [diff] [blame] | 163 | } |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 164 | g_static_strtab_maxprobe = 0; |
| 165 | g_static_mdtab_maxprobe = 0; |
| 166 | /* build static tables */ |
| 167 | memset(g_static_mdtab, 0, sizeof(g_static_mdtab)); |
| 168 | memset(g_static_strtab, 0, sizeof(g_static_strtab)); |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 169 | for (i = 0; i < GRPC_STATIC_MDSTR_COUNT; i++) { |
| 170 | grpc_mdstr *elem = &grpc_static_mdstr_table[i]; |
| 171 | const char *str = grpc_static_metadata_strings[i]; |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 172 | uint32_t hash = gpr_murmur_hash3(str, strlen(str), g_hash_seed); |
Craig Tiller | b774be4 | 2015-11-19 07:56:13 -0800 | [diff] [blame] | 173 | *(gpr_slice *)&elem->slice = gpr_slice_from_static_string(str); |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 174 | *(uint32_t *)&elem->hash = hash; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 175 | for (j = 0;; j++) { |
| 176 | size_t idx = (hash + j) % GPR_ARRAY_SIZE(g_static_strtab); |
| 177 | if (g_static_strtab[idx] == NULL) { |
| 178 | g_static_strtab[idx] = &grpc_static_mdstr_table[i]; |
| 179 | break; |
| 180 | } |
| 181 | } |
| 182 | if (j > g_static_strtab_maxprobe) { |
| 183 | g_static_strtab_maxprobe = j; |
| 184 | } |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 185 | } |
| 186 | for (i = 0; i < GRPC_STATIC_MDELEM_COUNT; i++) { |
| 187 | grpc_mdelem *elem = &grpc_static_mdelem_table[i]; |
Craig Tiller | ebdef9d | 2015-11-19 17:09:49 -0800 | [diff] [blame] | 188 | grpc_mdstr *key = |
| 189 | &grpc_static_mdstr_table[grpc_static_metadata_elem_indices[2 * i + 0]]; |
| 190 | grpc_mdstr *value = |
| 191 | &grpc_static_mdstr_table[grpc_static_metadata_elem_indices[2 * i + 1]]; |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 192 | uint32_t hash = GRPC_MDSTR_KV_HASH(key->hash, value->hash); |
Craig Tiller | b774be4 | 2015-11-19 07:56:13 -0800 | [diff] [blame] | 193 | *(grpc_mdstr **)&elem->key = key; |
| 194 | *(grpc_mdstr **)&elem->value = value; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 195 | for (j = 0;; j++) { |
| 196 | size_t idx = (hash + j) % GPR_ARRAY_SIZE(g_static_mdtab); |
| 197 | if (g_static_mdtab[idx] == NULL) { |
| 198 | g_static_mdtab[idx] = elem; |
| 199 | break; |
| 200 | } |
| 201 | } |
| 202 | if (j > g_static_mdtab_maxprobe) { |
| 203 | g_static_mdtab_maxprobe = j; |
| 204 | } |
| 205 | } |
| 206 | /* initialize shards */ |
| 207 | for (i = 0; i < STRTAB_SHARD_COUNT; i++) { |
| 208 | strtab_shard *shard = &g_strtab_shard[i]; |
| 209 | gpr_mu_init(&shard->mu); |
| 210 | shard->count = 0; |
| 211 | shard->capacity = INITIAL_STRTAB_CAPACITY; |
| 212 | shard->strs = gpr_malloc(sizeof(*shard->strs) * shard->capacity); |
| 213 | memset(shard->strs, 0, sizeof(*shard->strs) * shard->capacity); |
| 214 | } |
| 215 | for (i = 0; i < MDTAB_SHARD_COUNT; i++) { |
| 216 | mdtab_shard *shard = &g_mdtab_shard[i]; |
| 217 | gpr_mu_init(&shard->mu); |
| 218 | shard->count = 0; |
| 219 | shard->free = 0; |
| 220 | shard->capacity = INITIAL_MDTAB_CAPACITY; |
| 221 | shard->elems = gpr_malloc(sizeof(*shard->elems) * shard->capacity); |
| 222 | memset(shard->elems, 0, sizeof(*shard->elems) * shard->capacity); |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 223 | } |
| 224 | } |
| 225 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 226 | void grpc_mdctx_global_shutdown(void) { |
| 227 | size_t i; |
| 228 | for (i = 0; i < MDTAB_SHARD_COUNT; i++) { |
| 229 | mdtab_shard *shard = &g_mdtab_shard[i]; |
| 230 | gpr_mu_destroy(&shard->mu); |
Craig Tiller | 3407544 | 2015-11-23 16:16:54 -0800 | [diff] [blame] | 231 | gc_mdtab(shard); |
| 232 | /* TODO(ctiller): GPR_ASSERT(shard->count == 0); */ |
| 233 | if (shard->count != 0) { |
yang-g | d88e1d8 | 2015-12-02 13:23:33 -0800 | [diff] [blame] | 234 | gpr_log(GPR_DEBUG, "WARNING: %d metadata elements were leaked", |
| 235 | shard->count); |
Craig Tiller | 0cb803d | 2016-03-02 22:17:24 -0800 | [diff] [blame] | 236 | if (grpc_iomgr_abort_on_leaks()) { |
| 237 | abort(); |
| 238 | } |
Craig Tiller | 3407544 | 2015-11-23 16:16:54 -0800 | [diff] [blame] | 239 | } |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 240 | gpr_free(shard->elems); |
| 241 | } |
| 242 | for (i = 0; i < STRTAB_SHARD_COUNT; i++) { |
| 243 | strtab_shard *shard = &g_strtab_shard[i]; |
| 244 | gpr_mu_destroy(&shard->mu); |
Craig Tiller | 3407544 | 2015-11-23 16:16:54 -0800 | [diff] [blame] | 245 | /* TODO(ctiller): GPR_ASSERT(shard->count == 0); */ |
| 246 | if (shard->count != 0) { |
yang-g | d88e1d8 | 2015-12-02 13:23:33 -0800 | [diff] [blame] | 247 | gpr_log(GPR_DEBUG, "WARNING: %d metadata strings were leaked", |
| 248 | shard->count); |
Craig Tiller | 0cb803d | 2016-03-02 22:17:24 -0800 | [diff] [blame] | 249 | if (grpc_iomgr_abort_on_leaks()) { |
| 250 | abort(); |
| 251 | } |
Craig Tiller | 3407544 | 2015-11-23 16:16:54 -0800 | [diff] [blame] | 252 | } |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 253 | gpr_free(shard->strs); |
| 254 | } |
| 255 | } |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 256 | |
| 257 | static int is_mdstr_static(grpc_mdstr *s) { |
Craig Tiller | b774be4 | 2015-11-19 07:56:13 -0800 | [diff] [blame] | 258 | return s >= &grpc_static_mdstr_table[0] && |
| 259 | s < &grpc_static_mdstr_table[GRPC_STATIC_MDSTR_COUNT]; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 260 | } |
| 261 | |
| 262 | static int is_mdelem_static(grpc_mdelem *e) { |
Craig Tiller | b774be4 | 2015-11-19 07:56:13 -0800 | [diff] [blame] | 263 | return e >= &grpc_static_mdelem_table[0] && |
| 264 | e < &grpc_static_mdelem_table[GRPC_STATIC_MDELEM_COUNT]; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 265 | } |
| 266 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 267 | static void ref_md_locked(mdtab_shard *shard, |
| 268 | internal_metadata *md DEBUG_ARGS) { |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 269 | #ifdef GRPC_METADATA_REFCOUNT_DEBUG |
| 270 | gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, |
| 271 | "ELM REF:%p:%d->%d: '%s' = '%s'", md, |
| 272 | gpr_atm_no_barrier_load(&md->refcnt), |
| 273 | gpr_atm_no_barrier_load(&md->refcnt) + 1, |
| 274 | grpc_mdstr_as_c_string((grpc_mdstr *)md->key), |
| 275 | grpc_mdstr_as_c_string((grpc_mdstr *)md->value)); |
| 276 | #endif |
Craig Tiller | b8e8267 | 2015-10-10 13:52:47 -0700 | [diff] [blame] | 277 | if (0 == gpr_atm_no_barrier_fetch_add(&md->refcnt, 2)) { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 278 | shard->free--; |
Craig Tiller | b8e8267 | 2015-10-10 13:52:47 -0700 | [diff] [blame] | 279 | } else { |
| 280 | GPR_ASSERT(1 != gpr_atm_no_barrier_fetch_add(&md->refcnt, -1)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 281 | } |
| 282 | } |
| 283 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 284 | static void grow_strtab(strtab_shard *shard) { |
| 285 | size_t capacity = shard->capacity * 2; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 286 | size_t i; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 287 | internal_string **strtab; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 288 | internal_string *s, *next; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 289 | |
| 290 | GPR_TIMER_BEGIN("grow_strtab", 0); |
| 291 | |
| 292 | strtab = gpr_malloc(sizeof(internal_string *) * capacity); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 293 | memset(strtab, 0, sizeof(internal_string *) * capacity); |
| 294 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 295 | for (i = 0; i < shard->capacity; i++) { |
| 296 | for (s = shard->strs[i]; s; s = next) { |
| 297 | size_t idx = TABLE_IDX(s->hash, LOG2_STRTAB_SHARD_COUNT, capacity); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 298 | next = s->bucket_next; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 299 | s->bucket_next = strtab[idx]; |
| 300 | strtab[idx] = s; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 301 | } |
| 302 | } |
| 303 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 304 | gpr_free(shard->strs); |
| 305 | shard->strs = strtab; |
| 306 | shard->capacity = capacity; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 307 | |
| 308 | GPR_TIMER_END("grow_strtab", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 309 | } |
| 310 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 311 | static void internal_destroy_string(strtab_shard *shard, internal_string *is) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 312 | internal_string **prev_next; |
| 313 | internal_string *cur; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 314 | GPR_TIMER_BEGIN("internal_destroy_string", 0); |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 315 | if (is->has_base64_and_huffman_encoded) { |
| 316 | gpr_slice_unref(is->base64_and_huffman); |
| 317 | } |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 318 | for (prev_next = &shard->strs[TABLE_IDX(is->hash, LOG2_STRTAB_SHARD_COUNT, |
| 319 | shard->capacity)], |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 320 | cur = *prev_next; |
| 321 | cur != is; prev_next = &cur->bucket_next, cur = cur->bucket_next) |
| 322 | ; |
| 323 | *prev_next = cur->bucket_next; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 324 | shard->count--; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 325 | gpr_free(is); |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 326 | GPR_TIMER_END("internal_destroy_string", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 327 | } |
| 328 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 329 | static void slice_ref(void *p) { |
| 330 | internal_string *is = |
| 331 | (internal_string *)((char *)p - offsetof(internal_string, refcount)); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 332 | GRPC_MDSTR_REF((grpc_mdstr *)(is)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 333 | } |
| 334 | |
| 335 | static void slice_unref(void *p) { |
| 336 | internal_string *is = |
| 337 | (internal_string *)((char *)p - offsetof(internal_string, refcount)); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 338 | GRPC_MDSTR_UNREF((grpc_mdstr *)(is)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 339 | } |
| 340 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 341 | grpc_mdstr *grpc_mdstr_from_string(const char *str) { |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 342 | return grpc_mdstr_from_buffer((const uint8_t *)str, strlen(str)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 343 | } |
| 344 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 345 | grpc_mdstr *grpc_mdstr_from_slice(gpr_slice slice) { |
| 346 | grpc_mdstr *result = grpc_mdstr_from_buffer(GPR_SLICE_START_PTR(slice), |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 347 | GPR_SLICE_LENGTH(slice)); |
| 348 | gpr_slice_unref(slice); |
| 349 | return result; |
| 350 | } |
| 351 | |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 352 | grpc_mdstr *grpc_mdstr_from_buffer(const uint8_t *buf, size_t length) { |
| 353 | uint32_t hash = gpr_murmur_hash3(buf, length, g_hash_seed); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 354 | internal_string *s; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 355 | strtab_shard *shard = |
| 356 | &g_strtab_shard[SHARD_IDX(hash, LOG2_STRTAB_SHARD_COUNT)]; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 357 | size_t i; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 358 | size_t idx; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 359 | |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 360 | GPR_TIMER_BEGIN("grpc_mdstr_from_buffer", 0); |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 361 | |
| 362 | /* search for a static string */ |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 363 | for (i = 0; i <= g_static_strtab_maxprobe; i++) { |
| 364 | grpc_mdstr *ss; |
| 365 | idx = (hash + i) % GPR_ARRAY_SIZE(g_static_strtab); |
| 366 | ss = g_static_strtab[idx]; |
| 367 | if (ss == NULL) break; |
| 368 | if (ss->hash == hash && GPR_SLICE_LENGTH(ss->slice) == length && |
| 369 | 0 == memcmp(buf, GPR_SLICE_START_PTR(ss->slice), length)) { |
Craig Tiller | 07718b8 | 2015-11-21 14:06:45 -0800 | [diff] [blame] | 370 | GPR_TIMER_END("grpc_mdstr_from_buffer", 0); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 371 | return ss; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 372 | } |
| 373 | } |
| 374 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 375 | gpr_mu_lock(&shard->mu); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 376 | |
| 377 | /* search for an existing string */ |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 378 | idx = TABLE_IDX(hash, LOG2_STRTAB_SHARD_COUNT, shard->capacity); |
| 379 | for (s = shard->strs[idx]; s; s = s->bucket_next) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 380 | if (s->hash == hash && GPR_SLICE_LENGTH(s->slice) == length && |
| 381 | 0 == memcmp(buf, GPR_SLICE_START_PTR(s->slice), length)) { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 382 | GRPC_MDSTR_REF((grpc_mdstr *)s); |
| 383 | gpr_mu_unlock(&shard->mu); |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 384 | GPR_TIMER_END("grpc_mdstr_from_buffer", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 385 | return (grpc_mdstr *)s; |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | /* not found: create a new string */ |
| 390 | if (length + 1 < GPR_SLICE_INLINED_SIZE) { |
| 391 | /* string data goes directly into the slice */ |
| 392 | s = gpr_malloc(sizeof(internal_string)); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 393 | gpr_atm_rel_store(&s->refcnt, 2); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 394 | s->slice.refcount = NULL; |
| 395 | memcpy(s->slice.data.inlined.bytes, buf, length); |
| 396 | s->slice.data.inlined.bytes[length] = 0; |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 397 | s->slice.data.inlined.length = (uint8_t)length; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 398 | } else { |
| 399 | /* string data goes after the internal_string header, and we +1 for null |
| 400 | terminator */ |
| 401 | s = gpr_malloc(sizeof(internal_string) + length + 1); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 402 | gpr_atm_rel_store(&s->refcnt, 2); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 403 | s->refcount.ref = slice_ref; |
| 404 | s->refcount.unref = slice_unref; |
| 405 | s->slice.refcount = &s->refcount; |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 406 | s->slice.data.refcounted.bytes = (uint8_t *)(s + 1); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 407 | s->slice.data.refcounted.length = length; |
| 408 | memcpy(s->slice.data.refcounted.bytes, buf, length); |
| 409 | /* add a null terminator for cheap c string conversion when desired */ |
| 410 | s->slice.data.refcounted.bytes[length] = 0; |
| 411 | } |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 412 | s->has_base64_and_huffman_encoded = 0; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 413 | s->hash = hash; |
yang-g | cb7a802 | 2016-03-30 14:58:53 -0700 | [diff] [blame] | 414 | s->has_size_in_decoder_table = 0; |
| 415 | s->size_in_decoder_table = 0; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 416 | s->bucket_next = shard->strs[idx]; |
| 417 | shard->strs[idx] = s; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 418 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 419 | shard->count++; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 420 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 421 | if (shard->count > shard->capacity * 2) { |
| 422 | grow_strtab(shard); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 423 | } |
| 424 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 425 | gpr_mu_unlock(&shard->mu); |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 426 | GPR_TIMER_END("grpc_mdstr_from_buffer", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 427 | |
| 428 | return (grpc_mdstr *)s; |
| 429 | } |
| 430 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 431 | static void gc_mdtab(mdtab_shard *shard) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 432 | size_t i; |
| 433 | internal_metadata **prev_next; |
| 434 | internal_metadata *md, *next; |
| 435 | |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 436 | GPR_TIMER_BEGIN("gc_mdtab", 0); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 437 | for (i = 0; i < shard->capacity; i++) { |
| 438 | prev_next = &shard->elems[i]; |
| 439 | for (md = shard->elems[i]; md; md = next) { |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 440 | void *user_data = (void *)gpr_atm_no_barrier_load(&md->user_data); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 441 | next = md->bucket_next; |
Craig Tiller | 9fa41b9 | 2015-04-10 15:08:03 -0700 | [diff] [blame] | 442 | if (gpr_atm_acq_load(&md->refcnt) == 0) { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 443 | GRPC_MDSTR_UNREF((grpc_mdstr *)md->key); |
| 444 | GRPC_MDSTR_UNREF((grpc_mdstr *)md->value); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 445 | if (md->user_data) { |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 446 | ((destroy_user_data_func)gpr_atm_no_barrier_load( |
| 447 | &md->destroy_user_data))(user_data); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 448 | } |
| 449 | gpr_free(md); |
| 450 | *prev_next = next; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 451 | shard->free--; |
| 452 | shard->count--; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 453 | } else { |
| 454 | prev_next = &md->bucket_next; |
| 455 | } |
| 456 | } |
| 457 | } |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 458 | GPR_TIMER_END("gc_mdtab", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 459 | } |
| 460 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 461 | static void grow_mdtab(mdtab_shard *shard) { |
| 462 | size_t capacity = shard->capacity * 2; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 463 | size_t i; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 464 | internal_metadata **mdtab; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 465 | internal_metadata *md, *next; |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 466 | uint32_t hash; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 467 | |
| 468 | GPR_TIMER_BEGIN("grow_mdtab", 0); |
| 469 | |
| 470 | mdtab = gpr_malloc(sizeof(internal_metadata *) * capacity); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 471 | memset(mdtab, 0, sizeof(internal_metadata *) * capacity); |
| 472 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 473 | for (i = 0; i < shard->capacity; i++) { |
| 474 | for (md = shard->elems[i]; md; md = next) { |
| 475 | size_t idx; |
ctiller | fb93d19 | 2014-12-15 10:40:05 -0800 | [diff] [blame] | 476 | hash = GRPC_MDSTR_KV_HASH(md->key->hash, md->value->hash); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 477 | next = md->bucket_next; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 478 | idx = TABLE_IDX(hash, LOG2_MDTAB_SHARD_COUNT, capacity); |
| 479 | md->bucket_next = mdtab[idx]; |
| 480 | mdtab[idx] = md; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 481 | } |
| 482 | } |
| 483 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 484 | gpr_free(shard->elems); |
| 485 | shard->elems = mdtab; |
| 486 | shard->capacity = capacity; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 487 | |
| 488 | GPR_TIMER_END("grow_mdtab", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 489 | } |
| 490 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 491 | static void rehash_mdtab(mdtab_shard *shard) { |
| 492 | if (shard->free > shard->capacity / 4) { |
| 493 | gc_mdtab(shard); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 494 | } else { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 495 | grow_mdtab(shard); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 496 | } |
| 497 | } |
| 498 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 499 | grpc_mdelem *grpc_mdelem_from_metadata_strings(grpc_mdstr *mkey, |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 500 | grpc_mdstr *mvalue) { |
| 501 | internal_string *key = (internal_string *)mkey; |
| 502 | internal_string *value = (internal_string *)mvalue; |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 503 | uint32_t hash = GRPC_MDSTR_KV_HASH(mkey->hash, mvalue->hash); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 504 | internal_metadata *md; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 505 | mdtab_shard *shard = &g_mdtab_shard[SHARD_IDX(hash, LOG2_MDTAB_SHARD_COUNT)]; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 506 | size_t i; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 507 | size_t idx; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 508 | |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 509 | GPR_TIMER_BEGIN("grpc_mdelem_from_metadata_strings", 0); |
| 510 | |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 511 | if (is_mdstr_static(mkey) && is_mdstr_static(mvalue)) { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 512 | for (i = 0; i <= g_static_mdtab_maxprobe; i++) { |
| 513 | grpc_mdelem *smd; |
| 514 | idx = (hash + i) % GPR_ARRAY_SIZE(g_static_mdtab); |
| 515 | smd = g_static_mdtab[idx]; |
| 516 | if (smd == NULL) break; |
| 517 | if (smd->key == mkey && smd->value == mvalue) { |
Craig Tiller | 07718b8 | 2015-11-21 14:06:45 -0800 | [diff] [blame] | 518 | GPR_TIMER_END("grpc_mdelem_from_metadata_strings", 0); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 519 | return smd; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 520 | } |
| 521 | } |
| 522 | } |
| 523 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 524 | gpr_mu_lock(&shard->mu); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 525 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 526 | idx = TABLE_IDX(hash, LOG2_MDTAB_SHARD_COUNT, shard->capacity); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 527 | /* search for an existing pair */ |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 528 | for (md = shard->elems[idx]; md; md = md->bucket_next) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 529 | if (md->key == key && md->value == value) { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 530 | REF_MD_LOCKED(shard, md); |
| 531 | GRPC_MDSTR_UNREF((grpc_mdstr *)key); |
| 532 | GRPC_MDSTR_UNREF((grpc_mdstr *)value); |
| 533 | gpr_mu_unlock(&shard->mu); |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 534 | GPR_TIMER_END("grpc_mdelem_from_metadata_strings", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 535 | return (grpc_mdelem *)md; |
| 536 | } |
| 537 | } |
| 538 | |
| 539 | /* not found: create a new pair */ |
| 540 | md = gpr_malloc(sizeof(internal_metadata)); |
Craig Tiller | 63bda56 | 2015-10-09 17:40:19 -0700 | [diff] [blame] | 541 | gpr_atm_rel_store(&md->refcnt, 2); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 542 | md->key = key; |
| 543 | md->value = value; |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 544 | md->user_data = 0; |
| 545 | md->destroy_user_data = 0; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 546 | md->bucket_next = shard->elems[idx]; |
| 547 | shard->elems[idx] = md; |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 548 | gpr_mu_init(&md->mu_user_data); |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 549 | #ifdef GRPC_METADATA_REFCOUNT_DEBUG |
| 550 | gpr_log(GPR_DEBUG, "ELM NEW:%p:%d: '%s' = '%s'", md, |
| 551 | gpr_atm_no_barrier_load(&md->refcnt), |
| 552 | grpc_mdstr_as_c_string((grpc_mdstr *)md->key), |
| 553 | grpc_mdstr_as_c_string((grpc_mdstr *)md->value)); |
| 554 | #endif |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 555 | shard->count++; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 556 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 557 | if (shard->count > shard->capacity * 2) { |
| 558 | rehash_mdtab(shard); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 559 | } |
| 560 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 561 | gpr_mu_unlock(&shard->mu); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 562 | |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 563 | GPR_TIMER_END("grpc_mdelem_from_metadata_strings", 0); |
| 564 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 565 | return (grpc_mdelem *)md; |
| 566 | } |
| 567 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 568 | grpc_mdelem *grpc_mdelem_from_strings(const char *key, const char *value) { |
| 569 | return grpc_mdelem_from_metadata_strings(grpc_mdstr_from_string(key), |
| 570 | grpc_mdstr_from_string(value)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 571 | } |
| 572 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 573 | grpc_mdelem *grpc_mdelem_from_slices(gpr_slice key, gpr_slice value) { |
| 574 | return grpc_mdelem_from_metadata_strings(grpc_mdstr_from_slice(key), |
| 575 | grpc_mdstr_from_slice(value)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 576 | } |
| 577 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 578 | grpc_mdelem *grpc_mdelem_from_string_and_buffer(const char *key, |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 579 | const uint8_t *value, |
Craig Tiller | 4dbdd6a | 2015-09-25 15:12:16 -0700 | [diff] [blame] | 580 | size_t value_length) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 581 | return grpc_mdelem_from_metadata_strings( |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 582 | grpc_mdstr_from_string(key), grpc_mdstr_from_buffer(value, value_length)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 583 | } |
| 584 | |
yang-g | 24ba7c1 | 2016-03-30 16:19:43 -0700 | [diff] [blame^] | 585 | static size_t get_base64_encoded_size(size_t raw_length) { |
| 586 | static const uint8_t tail_xtra[3] = {0, 2, 3}; |
| 587 | return raw_length / 3 * 4 + tail_xtra[raw_length % 3]; |
| 588 | } |
| 589 | |
yang-g | cb7a802 | 2016-03-30 14:58:53 -0700 | [diff] [blame] | 590 | size_t grpc_mdelem_get_size_in_hpack_table(grpc_mdelem *elem) { |
| 591 | size_t overhead_and_key = 32 + GPR_SLICE_LENGTH(elem->key->slice); |
yang-g | 24ba7c1 | 2016-03-30 16:19:43 -0700 | [diff] [blame^] | 592 | size_t value_len = GPR_SLICE_LENGTH(elem->value->slice); |
yang-g | cb7a802 | 2016-03-30 14:58:53 -0700 | [diff] [blame] | 593 | if (is_mdstr_static(elem->value)) { |
yang-g | 24ba7c1 | 2016-03-30 16:19:43 -0700 | [diff] [blame^] | 594 | if (grpc_is_binary_header( |
| 595 | (const char *)GPR_SLICE_START_PTR(elem->key->slice), |
| 596 | GPR_SLICE_LENGTH(elem->key->slice))) { |
| 597 | return overhead_and_key + get_base64_encoded_size(value_len); |
| 598 | } else { |
| 599 | return overhead_and_key + value_len; |
| 600 | } |
yang-g | cb7a802 | 2016-03-30 14:58:53 -0700 | [diff] [blame] | 601 | } else { |
| 602 | internal_string *is = (internal_string *)elem->value; |
yang-g | cb7a802 | 2016-03-30 14:58:53 -0700 | [diff] [blame] | 603 | if (is->has_size_in_decoder_table == 0) { |
| 604 | is->has_size_in_decoder_table = 1; |
| 605 | if (grpc_is_binary_header( |
| 606 | (const char *)GPR_SLICE_START_PTR(elem->key->slice), |
| 607 | GPR_SLICE_LENGTH(elem->key->slice))) { |
yang-g | 24ba7c1 | 2016-03-30 16:19:43 -0700 | [diff] [blame^] | 608 | is->size_in_decoder_table = get_base64_encoded_size(value_len); |
yang-g | cb7a802 | 2016-03-30 14:58:53 -0700 | [diff] [blame] | 609 | } else { |
| 610 | is->size_in_decoder_table = value_len; |
| 611 | } |
| 612 | } |
| 613 | return overhead_and_key + is->size_in_decoder_table; |
| 614 | } |
| 615 | } |
| 616 | |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 617 | grpc_mdelem *grpc_mdelem_ref(grpc_mdelem *gmd DEBUG_ARGS) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 618 | internal_metadata *md = (internal_metadata *)gmd; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 619 | if (is_mdelem_static(gmd)) return gmd; |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 620 | #ifdef GRPC_METADATA_REFCOUNT_DEBUG |
| 621 | gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, |
| 622 | "ELM REF:%p:%d->%d: '%s' = '%s'", md, |
| 623 | gpr_atm_no_barrier_load(&md->refcnt), |
| 624 | gpr_atm_no_barrier_load(&md->refcnt) + 1, |
| 625 | grpc_mdstr_as_c_string((grpc_mdstr *)md->key), |
| 626 | grpc_mdstr_as_c_string((grpc_mdstr *)md->value)); |
| 627 | #endif |
Craig Tiller | 9fa41b9 | 2015-04-10 15:08:03 -0700 | [diff] [blame] | 628 | /* we can assume the ref count is >= 1 as the application is calling |
| 629 | this function - meaning that no adjustment to mdtab_free is necessary, |
| 630 | simplifying the logic here to be just an atomic increment */ |
| 631 | /* use C assert to have this removed in opt builds */ |
Craig Tiller | b8e8267 | 2015-10-10 13:52:47 -0700 | [diff] [blame] | 632 | assert(gpr_atm_no_barrier_load(&md->refcnt) >= 2); |
Craig Tiller | 9fa41b9 | 2015-04-10 15:08:03 -0700 | [diff] [blame] | 633 | gpr_atm_no_barrier_fetch_add(&md->refcnt, 1); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 634 | return gmd; |
| 635 | } |
| 636 | |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 637 | void grpc_mdelem_unref(grpc_mdelem *gmd DEBUG_ARGS) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 638 | internal_metadata *md = (internal_metadata *)gmd; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 639 | if (!md) return; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 640 | if (is_mdelem_static(gmd)) return; |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 641 | #ifdef GRPC_METADATA_REFCOUNT_DEBUG |
| 642 | gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, |
| 643 | "ELM UNREF:%p:%d->%d: '%s' = '%s'", md, |
| 644 | gpr_atm_no_barrier_load(&md->refcnt), |
| 645 | gpr_atm_no_barrier_load(&md->refcnt) - 1, |
| 646 | grpc_mdstr_as_c_string((grpc_mdstr *)md->key), |
| 647 | grpc_mdstr_as_c_string((grpc_mdstr *)md->value)); |
| 648 | #endif |
Craig Tiller | 63bda56 | 2015-10-09 17:40:19 -0700 | [diff] [blame] | 649 | if (2 == gpr_atm_full_fetch_add(&md->refcnt, -1)) { |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 650 | uint32_t hash = GRPC_MDSTR_KV_HASH(md->key->hash, md->value->hash); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 651 | mdtab_shard *shard = |
| 652 | &g_mdtab_shard[SHARD_IDX(hash, LOG2_MDTAB_SHARD_COUNT)]; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 653 | GPR_TIMER_BEGIN("grpc_mdelem_unref.to_zero", 0); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 654 | gpr_mu_lock(&shard->mu); |
Craig Tiller | b8e8267 | 2015-10-10 13:52:47 -0700 | [diff] [blame] | 655 | if (1 == gpr_atm_no_barrier_load(&md->refcnt)) { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 656 | shard->free++; |
Craig Tiller | b8e8267 | 2015-10-10 13:52:47 -0700 | [diff] [blame] | 657 | gpr_atm_no_barrier_store(&md->refcnt, 0); |
| 658 | } |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 659 | gpr_mu_unlock(&shard->mu); |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 660 | GPR_TIMER_END("grpc_mdelem_unref.to_zero", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 661 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 662 | } |
| 663 | |
| 664 | const char *grpc_mdstr_as_c_string(grpc_mdstr *s) { |
| 665 | return (const char *)GPR_SLICE_START_PTR(s->slice); |
| 666 | } |
| 667 | |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 668 | grpc_mdstr *grpc_mdstr_ref(grpc_mdstr *gs DEBUG_ARGS) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 669 | internal_string *s = (internal_string *)gs; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 670 | if (is_mdstr_static(gs)) return gs; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 671 | GPR_ASSERT(gpr_atm_full_fetch_add(&s->refcnt, 1) != 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 672 | return gs; |
| 673 | } |
| 674 | |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 675 | void grpc_mdstr_unref(grpc_mdstr *gs DEBUG_ARGS) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 676 | internal_string *s = (internal_string *)gs; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 677 | if (is_mdstr_static(gs)) return; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 678 | if (2 == gpr_atm_full_fetch_add(&s->refcnt, -1)) { |
| 679 | strtab_shard *shard = |
| 680 | &g_strtab_shard[SHARD_IDX(s->hash, LOG2_STRTAB_SHARD_COUNT)]; |
| 681 | gpr_mu_lock(&shard->mu); |
| 682 | if (1 == gpr_atm_no_barrier_load(&s->refcnt)) { |
| 683 | internal_destroy_string(shard, s); |
| 684 | } |
| 685 | gpr_mu_unlock(&shard->mu); |
| 686 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 687 | } |
| 688 | |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 689 | void *grpc_mdelem_get_user_data(grpc_mdelem *md, void (*destroy_func)(void *)) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 690 | internal_metadata *im = (internal_metadata *)md; |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 691 | void *result; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 692 | if (is_mdelem_static(md)) { |
| 693 | return (void *)grpc_static_mdelem_user_data[md - grpc_static_mdelem_table]; |
| 694 | } |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 695 | if (gpr_atm_acq_load(&im->destroy_user_data) == (gpr_atm)destroy_func) { |
| 696 | return (void *)gpr_atm_no_barrier_load(&im->user_data); |
| 697 | } else { |
| 698 | return NULL; |
| 699 | } |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 700 | return result; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 701 | } |
| 702 | |
| 703 | void grpc_mdelem_set_user_data(grpc_mdelem *md, void (*destroy_func)(void *), |
| 704 | void *user_data) { |
| 705 | internal_metadata *im = (internal_metadata *)md; |
Craig Tiller | ebdef9d | 2015-11-19 17:09:49 -0800 | [diff] [blame] | 706 | GPR_ASSERT(!is_mdelem_static(md)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 707 | GPR_ASSERT((user_data == NULL) == (destroy_func == NULL)); |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 708 | gpr_mu_lock(&im->mu_user_data); |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 709 | if (gpr_atm_no_barrier_load(&im->destroy_user_data)) { |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 710 | /* user data can only be set once */ |
| 711 | gpr_mu_unlock(&im->mu_user_data); |
| 712 | if (destroy_func != NULL) { |
| 713 | destroy_func(user_data); |
| 714 | } |
| 715 | return; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 716 | } |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 717 | gpr_atm_no_barrier_store(&im->user_data, (gpr_atm)user_data); |
| 718 | gpr_atm_rel_store(&im->destroy_user_data, (gpr_atm)destroy_func); |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 719 | gpr_mu_unlock(&im->mu_user_data); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 720 | } |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 721 | |
| 722 | gpr_slice grpc_mdstr_as_base64_encoded_and_huffman_compressed(grpc_mdstr *gs) { |
| 723 | internal_string *s = (internal_string *)gs; |
| 724 | gpr_slice slice; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 725 | strtab_shard *shard = |
| 726 | &g_strtab_shard[SHARD_IDX(s->hash, LOG2_STRTAB_SHARD_COUNT)]; |
| 727 | gpr_mu_lock(&shard->mu); |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 728 | if (!s->has_base64_and_huffman_encoded) { |
| 729 | s->base64_and_huffman = |
| 730 | grpc_chttp2_base64_encode_and_huffman_compress(s->slice); |
ctiller | 33023c4 | 2014-12-12 16:28:33 -0800 | [diff] [blame] | 731 | s->has_base64_and_huffman_encoded = 1; |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 732 | } |
| 733 | slice = s->base64_and_huffman; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 734 | gpr_mu_unlock(&shard->mu); |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 735 | return slice; |
David Garcia Quintas | 2bf574f | 2016-01-14 15:27:08 -0800 | [diff] [blame] | 736 | } |